JWT Decoder & Encoder
Decode any JSON Web Token, inspect claims, verify HMAC signatures, and encode new tokens.
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Token
Frequently Asked Questions
Is the JWT decoder free?
Yes, completely free with no account or signup required.
Is my JWT token safe?
All decoding and encoding happens in your browser. Your token is never sent to any server.
What JWT features are included?
Decode JWT tokens, inspect header and payload, verify HMAC signatures (HS256/384/512), encode new tokens, check claim expiry, and share via URL.
Can I verify JWT signatures?
Yes, using HS256, HS384, and HS512 with your secret key via the browser's Web Crypto API.